Hole saw



FIG. 1 shows a perspective view of the hole saw of the present design;

FIG. 2 shows a right side view of the hole saw of the present design, the left side view diametrically opposite the right side view of FIG. 2 being a mirror image;

FIG. 3 shows a top view of the hole saw of the present design;

FIG. 4 shows a bottom view of the hole saw of the present design; and,

FIG. 5 shows a perspective view of the hole saw of a second embodiment of the design of FIG. 1.

The broken lines disclosure illustrated in the drawings are for illustration purposes only and form no part of the claimed design. 

The ornamental design for a hole saw, as shown and described. 